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Minor edits to default alert docs

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Catherine Luse
2019-08-19 15:48:56 -07:00
parent eab77737fa
commit af483bddbe
1 changed files with 4 additions and 4 deletions
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content/rancher/v2.x/en/cluster-admin/tools/alerts/default-alerts/_index.md
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@@ -9,7 +9,7 @@ Several of the alerts use Prometheus expressions as the metric that triggers the
/rancher/v2.x/en/cluster-admin/tools/monitoring/expression/) or the Prometheus [documentation about querying metrics](https://prometheus.io/docs/prometheus/latest/querying/basics/). /rancher/v2.x/en/cluster-admin/tools/monitoring/expression/) or the Prometheus [documentation about querying metrics](https://prometheus.io/docs/prometheus/latest/querying/basics/).
# Alerts for etcd # Alerts for etcd
Etcd is the key-value store that contains the state of the Kubernetes cluster. If you provide monitoring on your cluster, Rancher provides default alerts if the monitoring detects a potential problem with etcd. Etcd is the key-value store that contains the state of the Kubernetes cluster. Rancher provides default alerts if the built-in monitoring detects a potential problem with etcd. You don't have to enable monitoring to receive these alerts.
A leader is the node that handles all client requests that need cluster consensus. For more information, you can refer to this [explanation of how etcd works.](https://rancher.com/blog/2019/2019-01-29-what-is-etcd/#how-does-etcd-work) A leader is the node that handles all client requests that need cluster consensus. For more information, you can refer to this [explanation of how etcd works.](https://rancher.com/blog/2019/2019-01-29-what-is-etcd/#how-does-etcd-work)
@@ -23,7 +23,7 @@ The leader of the cluster can change in response to certain events. It is normal
| Etcd member has no leader | A critical alert is triggered when the etcd cluster does not have a leader for at least three minutes. | | Etcd member has no leader | A critical alert is triggered when the etcd cluster does not have a leader for at least three minutes. |
# Alerts for Kube Components # Alerts for Kubernetes Components
Rancher provides alerts when core Kubernetes system components become unhealthy. Rancher provides alerts when core Kubernetes system components become unhealthy.
Controllers update Kubernetes resources based on changes in etcd. The [controller manager](https://kubernetes.io/docs/reference/command-line-tools-reference/kube-controller-manager/) monitors the cluster desired state through the Kubernetes API server and makes the necessary changes to the current state to reach the desired state. Controllers update Kubernetes resources based on changes in etcd. The [controller manager](https://kubernetes.io/docs/reference/command-line-tools-reference/kube-controller-manager/) monitors the cluster desired state through the Kubernetes API server and makes the necessary changes to the current state to reach the desired state.
@@ -41,11 +41,11 @@ Kubernetes events are objects that provide insight into what is happening inside
| Alert | Explanation | | Alert | Explanation |
|-------|-------------| |-------|-------------|
| Get warning deployment event | A warning alert is triggered by a warning event happens on a deployment. | | Get warning deployment event | A warning alert is triggered when a warning event happens on a deployment. |
# Alerts for Nodes # Alerts for Nodes
Alerts can be triggered based on node metrics. Alerts can be triggered based on node metrics. Each computing resource in a Kubernetes cluster is called a node. [Nodes]({{<baseurl>}}/rancher/v2.x/en/cluster-admin/#kubernetes-cluster-node-components) can be either bare-metal servers or virtual machines.
| Alert | Explanation | | Alert | Explanation |
|-------|-------------| |-------|-------------|